1  /* { dg-do compile } */ 
       2  /* { dg-options "-O2 -fdump-tree-reassoc1" } */
       3  
       4  int main(int a, int b, int c, int d, int e, int f, int g, int h)
       5  {
       6    /* e & ~e -> 0 */
       7    int i = (a & 9) & (c & d);
       8    int j = (~e & d) & (~c & e);
       9    e = i & j;
      10    return e;
      11  }
      12  /* { dg-final { scan-tree-dump-times "= 0" 1 "reassoc1"} } */